There are two popular modern styles of sitar offered in a variety of sub-styles and decorative patterns. The two popular styles are the "gayaki style" sitars (sometimes called "Vilayat Khan style sitars") and the full decorated "instrumental style" sitars (sometimes called "Ravi Shankar style sitars"). The gayaki style sitar is mostly of seasoned toon wood, with very few or no carved decorations. It often has a dark polish. The inlay decorations are mostly of mother of pearl (imitation). The number of sympathetic strings is often limited to eleven but may extend to thirteen. Jawari (bridge) grinding styles are also different, as is the thickness of the "tabli" (soundboard).A sitar can have 18, 19 or 20 strings. Six or seven of these are played strings which run over curved, raised frets, and the remainder are sympathetic strings (tarb, also known as taarif or tarafdaar) which run underneath the frets and resonate in sympathy with the played